diff --git a/Classes/Model/Provider.php b/Classes/Model/Provider.php
index 48cf94d..92f9e6b 100644
--- a/Classes/Model/Provider.php
+++ b/Classes/Model/Provider.php
@@ -28,7 +28,7 @@
  */
 class Tx_T3rest_Model_Provider extends \Sys25\RnBase\Domain\Model\BaseModel
 {
-    private $configurations = null;
+    private $configurations;
 
     /**
      * Gets the name of the database table.
diff --git a/Classes/Model/ProviderHolder.php b/Classes/Model/ProviderHolder.php
index 269fef7..d64cd6f 100644
--- a/Classes/Model/ProviderHolder.php
+++ b/Classes/Model/ProviderHolder.php
@@ -33,7 +33,7 @@ abstract class Tx_T3rest_Model_ProviderHolder
     /**
      * @var Tx_T3rest_Model_Provider
      */
-    private $provider = null;
+    private $provider;
 
     /**
      * injects the provider model.
diff --git a/Classes/Provider/AbstractProvider.php b/Classes/Provider/AbstractProvider.php
index a6b1a6b..11f77b3 100644
--- a/Classes/Provider/AbstractProvider.php
+++ b/Classes/Provider/AbstractProvider.php
@@ -32,12 +32,12 @@ abstract class Tx_T3rest_Provider_AbstractProvider extends Tx_T3rest_Model_Provi
     /**
      * @var Tx_T3rest_Transformer_InterfaceTransformer
      */
-    private $transformer = null;
+    private $transformer;
 
     /**
      * @var string
      */
-    private $rawRequestBody = null;
+    private $rawRequestBody;
 
     /**
      * @var Tx_T3rest_Routines_Auth_Ip